Municipals: nest 1,823 city officeholders under their real counties

Pull Atlas's place→county crosswalk (Census TIGER 2024 places × county
geometries, 32,041 places) into the build as a committed raw input, and
use it to resolve municipal officeholders whose county was unknown.

- data/place_county_crosswalk.jsonl — new raw input (place_geoid → county_geoid)
- build.py — place-name+state → county_geoid → ACS county slug as a fallback
  in county_slug(); city_slug() generalized to non-FL bare place labels
- data/sources/sources.yaml — provenance entry for the crosswalk

_unresolved municipals: 1919 → 58. The remainder are genuine: CT planning
regions (post-county), county-level rows mislabeled municipal upstream,
consolidated city-counties (null label), Wikidata-QID placeholder names,
and ambiguous same-name places — left unresolved rather than guessed.

Join key is county_geoid (5-digit FIPS); the directory slug is taken from
the ACS county node so municipals nest under the exact existing county dir.
Deterministic (byte-identical rebuild); validate.py passes 19,721 records.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

data/jurisdictions/us/states/il/counties/boone/index.md

@@ -32,7 +32,7 @@ timestamp: "2026-07-03"
 
 # Boone County, IL
 
-County jurisdiction.
+County jurisdiction — 1 officeholders mapped.
 
 ## Demographics (ACS 2023)
 

data/jurisdictions/us/states/il/counties/bureau/index.md

@@ -32,7 +32,7 @@ timestamp: "2026-07-03"
 
 # Bureau County, IL
 
-County jurisdiction.
+County jurisdiction — 1 officeholders mapped.
 
 ## Demographics (ACS 2023)
 

data/jurisdictions/us/states/il/counties/cook/index.md

@@ -32,7 +32,7 @@ timestamp: "2026-07-03"
 
 # Cook County, IL
 
-County jurisdiction.
+County jurisdiction — 1 officeholders mapped.
 
 ## Demographics (ACS 2023)
 

data/jurisdictions/us/states/il/counties/dupage/index.md

@@ -32,7 +32,7 @@ timestamp: "2026-07-03"
 
 # DuPage County, IL
 
-County jurisdiction.
+County jurisdiction — 1 officeholders mapped.
 
 ## Demographics (ACS 2023)
 

data/jurisdictions/us/states/il/counties/kane/index.md

@@ -32,7 +32,7 @@ timestamp: "2026-07-03"
 
 # Kane County, IL
 
-County jurisdiction.
+County jurisdiction — 2 officeholders mapped.
 
 ## Demographics (ACS 2023)
 

data/jurisdictions/us/states/il/counties/lake/index.md

@@ -32,7 +32,7 @@ timestamp: "2026-07-03"
 
 # Lake County, IL
 
-County jurisdiction.
+County jurisdiction — 2 officeholders mapped.
 
 ## Demographics (ACS 2023)
 

data/jurisdictions/us/states/il/counties/lasalle/index.md

@@ -32,7 +32,7 @@ timestamp: "2026-07-03"
 
 # LaSalle County, IL
 
-County jurisdiction.
+County jurisdiction — 1 officeholders mapped.
 
 ## Demographics (ACS 2023)
 

data/jurisdictions/us/states/il/counties/macon/index.md

@@ -32,7 +32,7 @@ timestamp: "2026-07-03"
 
 # Macon County, IL
 
-County jurisdiction.
+County jurisdiction — 1 officeholders mapped.
 
 ## Demographics (ACS 2023)
 

data/jurisdictions/us/states/il/counties/mclean/index.md

@@ -32,7 +32,7 @@ timestamp: "2026-07-03"
 
 # McLean County, IL
 
-County jurisdiction.
+County jurisdiction — 1 officeholders mapped.
 
 ## Demographics (ACS 2023)
 

data/jurisdictions/us/states/il/counties/montgomery/index.md

@@ -32,7 +32,7 @@ timestamp: "2026-07-03"
 
 # Montgomery County, IL
 
-County jurisdiction.
+County jurisdiction — 1 officeholders mapped.
 
 ## Demographics (ACS 2023)
 

data/jurisdictions/us/states/il/counties/peoria/index.md

@@ -32,7 +32,7 @@ timestamp: "2026-07-03"
 
 # Peoria County, IL
 
-County jurisdiction.
+County jurisdiction — 1 officeholders mapped.
 
 ## Demographics (ACS 2023)
 

data/jurisdictions/us/states/il/counties/sangamon/index.md

@@ -32,7 +32,7 @@ timestamp: "2026-07-03"
 
 # Sangamon County, IL
 
-County jurisdiction.
+County jurisdiction — 1 officeholders mapped.
 
 ## Demographics (ACS 2023)
 

data/jurisdictions/us/states/il/counties/tazewell/index.md

@@ -32,7 +32,7 @@ timestamp: "2026-07-03"
 
 # Tazewell County, IL
 
-County jurisdiction.
+County jurisdiction — 1 officeholders mapped.
 
 ## Demographics (ACS 2023)
 

data/jurisdictions/us/states/il/counties/will/index.md

@@ -32,7 +32,7 @@ timestamp: "2026-07-03"
 
 # Will County, IL
 
-County jurisdiction.
+County jurisdiction — 1 officeholders mapped.
 
 ## Demographics (ACS 2023)
 

data/jurisdictions/us/states/il/counties/winnebago/index.md

@@ -32,7 +32,7 @@ timestamp: "2026-07-03"
 
 # Winnebago County, IL
 
-County jurisdiction.
+County jurisdiction — 2 officeholders mapped.
 
 ## Demographics (ACS 2023)